Betylates. 3. Preparative nucleophilic substitution by way of [2]-, [3]-, and [4]betylates. Stoichiometric phase transfer and substrate-reagent ion-pair (SRIP) reactions of betylates
Two-Phase Oxidations with Aqueous Hydrogen Peroxide Catalyzed by Amphiphilic Pyridinium and Diazinium Salts
作者:Tomáš Hartman、Jiří Šturala、Radek Cibulka
DOI:10.1002/adsc.201500687
日期:2015.11.16
Amphiphilic pyridinium and diazinium salts were shown to be effective catalysts in two-phase (water/chloroform or water/dichloromethane) sulfoxidations and N-oxidations with hydrogenperoxide under mild conditions. This unprecedented oxidation method utilizes covalent bonding of hydrogenperoxide to a simple pyridinium or diazinium nucleus to increase the lipophilicity of the hydroperoxide species
this paper, we describe a simple and efficient procedure of original N‐alkyl‐3‐boronopyridiniumtriflatessynthesis and report on the surface properties of these surfactants. Key micellar parameters were obtained, the critical micelle concentrations (CMC values) were determined and compared to conventional ionic surfactants as well as the surface activity of these surfactants (pC20 value and the surface
Thermoregulated Microemulsions by Cyclodextrin Sequestration: A New Approach to Efficient Catalyst Recovery
作者:Loïc Leclercq、Matthieu Lacour、Samantha H. Sanon、Andreea R. Schmitzer
DOI:10.1002/chem.200900763
日期:2009.6.22
The combination of imidazolium surfactants with α‐cyclodextrins (CDs, in green) was used as a control element in the thermoregulated aqueous olefin hydroformylation. The self‐assembly of the imidazolium surfactants (red) favors the micellization process at high temperatures, whereas at lower temperatures the complexation of the surfactant monomers into the α‐CDs is favored.
<i>N</i>,<i>N′</i>-Methylenediimidazolium Salts: From Self-Assembly to an Efficient DNAse Protection System
作者:Christophe Pardin、Loïc Leclercq、Andreea R. Schmitzer
DOI:10.1002/chem.200902794
日期:2010.4.19
We have developed N,N′‐dialkylmethylenediimidazolium salts ([CnCnDIM][X]2) that self‐organize into multilayered cationic vesicles and can interact with DNA. These preorganized systems form complexes with linear DNA and protect it fromDNase I cleavage.
我们已经开发了N,N'-二烷基亚甲基二咪唑鎓盐([C n C n DIM] [X] 2),它们可以自组织成多层阳离子囊泡,并且可以与DNA相互作用。这些预组织的系统与线性DNA形成复合物,并保护其免受DNase I裂解。
Folate-Equipped Pegylated Archaeal Lipid Derivatives: Synthesis and Transfection Properties
cationic lipid and the resulting formulations were tested in transfection assays after complexation with plasmid DNA. All four novel co-lipids afforded efficient in vitro gene transfection. Moreover, the FA-equipped derivatives permitted ligand/receptor-based targeted transfection; their activity was inhibited when free FA was added to the transfection medium. These novel archaealderivatives equipped